Re: [APML] Cats paw on the tail of the scorpion

[Ray Butler <ray.butler@nuigalway.ie>]

Hi Len,

The colours look fine on my screen (set to 9300K colour temperature).
No sign of residual vignetting.
Can't see any obvious trailing, but the image scale is small in that 
jpeg, so that helps to hide it.
It does look a bit soft. Hard to tell why, as some jpeg compressors can 
have this effect too. Was it more apparent after your noise removal step?
There are clear bluish chromatic halos around stars - so I presume the 
200mm lens was at full aperture; would that be f4?
Overall, a very nice result!

Ray

>With all the bad weather here in South Texas lately, the only thing to do is
>processing.  Of which I need lots of practice.  Thought I try fooling around
>with some of my not so well tracked or guided shots.
>
>I shot this two years ago at TSP.  This was my first shot with a lens >50mm.  I
>was excited when I first looked at the scan at the lab without a loupe.  But,
>when I got home the scan showed some trailing.  I think it was guiding and not
>field rotation as the elongation of the stars appeared East-West and linear on
>the top and bottom of the frame.
>
>Just a few details as I would have to find the old logbook...
>OM1, 200mm, E200, piggybacked on an LX200 w/ wedge.
>
>http://home.houston.rr.com/lencasady/catspaw.jpg
>
>There was also some very obvious vingetting and noise I tried to remove.  Does
>it look way too soft?
>
>How are the colors?  On this note, I found that my colors looked different at
>home than they did when viewing from work.  Found that the Nvidia video driver
>had a setting for "Digital Vibrance" turned on.  I think it basically ups the
>saturation and brightness of the screen.  Turned it off and then processed.
>
>Comments?
>
>Thanks
>Len
>
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